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3.6.5

Patch Changes

  • 5546e4d: Trim whitespace from api_key, personal_api_key, and host config values, and default host to https://us.i.posthog.com.

3.6.4

Patch Changes

  • 8f9cf78: Trigger another patch release to verify the Ruby release workflow.

3.6.3

Patch Changes

  • d83df86: Simplify Ruby release token usage to retry the automated release flow.

3.6.2

Patch Changes

  • f69d97a: Switch the Ruby SDK to automated Changesets-based releases.
    • Multiple instances can cause dropped events and inconsistent behavior
    • Use disable_singleton_warning: true when intentionally creating multiple clients (e.g., for different projects)
    • Documentation updated with singleton best practices

3.5.5 - 2026-03-04

  1. feat: Add semver comparison operators for local feature flag evaluation (#107)
    • Supports semver_eq, semver_neq, semver_gt, semver_gte, semver_lt, semver_lte for direct comparisons
    • Supports semver_tilde, semver_caret, semver_wildcard for range matching
    • Handles v-prefix, pre-release suffixes, partial versions, and whitespace

3.5.4 - 2026-02-15

  1. fix: Move Rails generator template to lib/generators/posthog/templates/ to ensure it's included in the gem package (#103)

3.5.3 - 2026-02-08

  1. fix: Fix Railtie middleware insertion crashing on Rails initialization — changed insert_middleware_after from a class method to an instance method (matching how Rails executes initializer blocks via instance_exec), and removed the unsupported include? query on MiddlewareStackProxy (#97)
  2. fix: Prevent sending empty batches and handle non-JSON response bodies gracefully in transport layer (#87)
  3. fix: Use $current_url property (instead of $request_url) so exception URLs appear correctly in the PostHog UI
  4. fix: Only include source context lines for in-app exception frames, avoiding unnecessary reads of gem source files (#88)

3.5.2 - 2026-02-06

  1. fix: Filter out failed flag evaluations to prevent cached values from being overwritten during transient server errors (#96)

3.5.1 - 2026-02-06

  1. Fix posthog-rails deployment

3.5.0 - 2026-02-05

  1. feat: Add posthog-rails gem for automatic Rails exception tracking
    • Automatic capture of unhandled exceptions via Rails middleware
    • Automatic capture of rescued exceptions (configurable)
    • Automatic instrumentation of ActiveJob failures
    • Integration with Rails 7.0+ error reporter
    • Configurable exception exclusion list
    • User context capture from controllers

3.4.0 - 2025-12-04

  1. feat: Add ETag support for feature flag definitions polling (#84)

3.3.3 - 2025-10-22

  1. fix: fallback to API for multi-condition flags with static cohorts (#80)

3.3.2 - 2025-09-26

  1. fix: don't sort condition sets with variant overrides to top (#78)

3.3.1 - 2025-09-26

Not used

3.3.0 - 2025-09-23

  1. feat: add exception capture (#77)

3.2.0 - 2025-08-26

  1. feat: Add support for local evaluation of flags that depend on other flags (#75)

3.1.2 - 2025-08-26

  1. fix: Add cohort evaluation support for local feature flag evaluation (#74)

3.1.1 - 2025-08-06

  1. fix: Pass project API key in remote_config requests (#72)

3.1.0 - 2025-08-06

  1. feat: make the send_feature_flags parameter more declarative and ergonomic

3.0.1 - 2025-05-20

  1. fix: was warning on absent UUID when capturing (#67)

3.0.0 - 2025-05-20

  1. Drops support for Ruby 2.x (#63)

Version 3.0 of the Ruby SDK drops support for Ruby 2.x. The minimum supported version is now Ruby 3.2.

In previous version FeatureFlags was added as a top-level class and was causing conflicts for other folk's applications.

In this change we have properly namespaced all classes within a PostHog module. See #60

2.11.0 – 2025-05-20

  1. feat: add before_send function (#64)

2.10.0 – 2025-05-20

  1. chore: fix all rubocop errors (#61)
  2. fix: add UUID capture option to capture (#58)

2.9.0 – 2025-04-30

  1. Use new /flags service to power feature flag evaluation.

2.8.1 – 2025-04-18

  1. Fix condition_index can be null in /decide requests

2.8.0 – 2025-04-07

  1. Add more information to $feature_flag_called events for /decide requests such as flag id, version, reason, and the request id.

2.7.2 – 2025-03-14

  1. Fix invocation of shell by ` character

2.7.0 – 2025-02-26

  1. Add support for quota-limited feature flags

2.6.0 - 2025-02-13

  1. Add method for fetching decrypted remote config flag payload

2.5.1 - 2024-12-19

  1. Adds a new, optional distinct_id parameter to group identify calls which allows specifying the Distinct ID for the event.

2.5.0 - 2024-03-15

  1. Adds a new feature_flag_request_timeout_seconds timeout parameter for feature flags which defaults to 3 seconds, updated from the default 10s for all other API calls.

2.4.3 - 2024-02-29

  1. Fix memory leak in PostHog::Client.new

2.4.2 - 2024-01-26

  1. Remove new relative date operators, combine into regular date operators

2.4.1 - 2024-01-09

  1. Add default properties for feature flags local evaluation, to target flags by distinct id & group keys.

2.4.0 - 2024-01-09

  1. Numeric property handling for feature flags now does the expected: When passed in a number, we do a numeric comparison. When passed in a string, we do a string comparison. Previously, we always did a string comparison.
  2. Add support for relative date operators for local evaluation.

2.3.1 - 2023-08-14

  1. Update option doc string to show personal API Key as an option

2.3.0 - 2023-02-15

  1. Add support for feature flag payloads

2.2.0 - 2023-02-08

  1. Remove concurrent gem dependency version limitation

2.1.0 - 2022-11-14

  1. Add support for datetime operators for local feature flag evaluation
  2. Add support for variant overrides for local feature flag evaluation

2.0.0 - 2022-08-12

Breaking changes:

  1. Minimum PostHog version requirement: 1.38
  2. Regular feature flag evaluation (i.e. by requesting from your PostHog servers) doesn't require a personal API key.
  3. Client initialisation doesn't take the api_host parameter anymore. Instead, it takes the host parameter, which needs to be fully qualified. For example: https://api.posthog.com is valid, while api.posthog.com is not valid.
  4. The log level by default is set to WARN. You can change it to DEBUG if you want to debug the client by running client.logger.level = Logger::DEBUG, where client is your initialized PostHog::Client instance.
  5. Default polling interval for feature flags is now set at 30 seconds. If you don't want local evaluation, don't set a personal API key in the library.
  6. Feature flag defaults are no more. Now, if a flag fails to compute for whatever reason, it will return nil. Otherwise, it returns either true or false. In case of get_feature_flag, it may also return a string variant value.

New Changes:

  1. You can now evaluate feature flags locally (i.e. without sending a request to your PostHog servers) by setting a personal API key, and passing in groups and person properties to is_feature_enabled and get_feature_flag calls.
  2. Introduces a get_all_flags method that returns all feature flags. This is useful for when you want to seed your frontend with some initial flags, given a user ID.

1.3.0 - 2022-06-24

  • Add support for running the client in "No-op" mode for testing (#15)

1.2.4 - 2022-05-30

  • Fix create_alias call (#14)

1.2.3 - 2022-01-18

  • Fix present? call (#12)

1.2.2 - 2021-11-22

  • Add ability to disable SSL verification by passing skip_ssl_verification (#11)

1.2.1 - 2021-11-19

  • Add concurrent-ruby gem dependency (fixes #8)

1.1.0 - 2020-12-15

  • Change default domain from t.posthog.com to app.posthog.com